Paradyne 3551 manual Optional Features, 32 DBM

COMSPHERE 3550 Series Data Service Units

•Diagnostic Control Panel control. The

Model 3550 DSU is controlled from its diagnostic control panel (DCP). The diagnostic control panel for the Model 3551 DSU, called a shared diagnostic control panel (SDCP), is installed in the

3000 Series Carrier. Both control panels display information about the DSU on a 2-line,

16-character liquid crystal display (LCD) and through light-emitting diode (LED) status indicators.

NOTE

Except where a distinction is made, the term DCP refers to both types of diagnostic control panels, the DCP or the SDCP.

•Full tributary diagnostics. The DSU supports a full complement of diagnostic tests and commands. Diagnostics can be addressed to and sent to tributaries from a 6700 Series NMS workstation or from the DCP of a control DSU.

•External dial backup. The DSU can use an external dial backup unit (DBU ± e.g., a

3800 Series dial/lease modem) to provide backup. This feature may be used in a point-to-point DSU configuration and can be used with either a control or tributary DSU.

For more information about the 3000 Series Carrier or the SDCP, refer to the COMSPHERE 3000 Series Carrier, Installation Manual. For more information about the

6700 Series NMS, refer to the COMSPHERE 6700 Series Network Management System, User's Guide. These are identified in the Related Documents section of the Preface, which also provides information on how to order these documents.

Optional Features

The Model 3550 DSU can be ordered with the following optional features:

•V.32bis 14.4 kbps Dial Backup Module (DBM)

•Time Division Multiplexer (TDM/Flex)

The Model 3551 DSU can be ordered with a V.32bis 14.4 kbps DBM, or it can be used with an external DBU.

If your DSU is not equipped with these options, go to the next section.

V.32 DBM

The V.32bis 14.4 kbps dial backup module (referred to as DBM throughout this guide) childboard is attached to the DSU circuit card. The DBM provides the following features:

•Multispeed point-to-point backup. The DBM provides point-to-point service over the 2-wire dial network. Backup rates available are 2.4, 4.8, 9.6, 12.0, and 14.4 kbps.

•Independent operation. Although the DBM is installed on the DSU, the two are configured separately and most tests can be run on either independent of the other (e.g., you can run a test on the DBM while a test is running on the DSU).

•Security. There are four levels of call setup security: None, Password, Callback, and Alarm.

•Management control. Dial backup can be initiated from a 6700 Series NMS, the DSU's DCP, or it can be initiated automatically by the DSU-DBM.

•Automatic setup and restoration. When configured for automatic backup, the DSU-DBM initiates dial backup when it detects a failure in the network, then restores the data path to the DDS circuit when the network returns to service.

1-2 December 1996 3550-A2-GB20-20